update hugo version and the theme

Update to hugo 0.72.0.
Merge latest hugo-academic theme

.hugo_version

@@ -1 +1 @@
-0.67.0
+0.72.0

themes/academic

@@ -1 +1 @@
-Subproject commit 6cb70207b800acbbc205014403e8ded2697841a3
+Subproject commit 91374494a6359ab005370ce6a654e8c4b19acb02